Rockford Fosgate Prime R750-1D

750W RMS Prime Series Class-D Monoblock 1-Ohm Stable Amplifier

Product videos

• RMS: 250W x 1 @ 4 ohms, 500W x 1 @ 2 ohms, 750W x 1 @ 1 ohm
• Total RMS Power: 750W
• CEA-2006 Compliant
• Punch Bass: 0 to +12 dB
• Class D Circuitry
• Dimensions: 6-11/16"L x 9-1/8"W x 2"H

Learn more about the r7501d

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This item has been discontinued

Product Highlights

• RMS: 250W x 1 @ 4 ohms, 500W x 1 @ 2 ohms, 750W x 1 @ 1 ohm
• Total RMS Power: 750W
• CEA-2006 Compliant
• Punch Bass: 0 to +12 dB
• Class D Circuitry
• Dimensions: 6-11/16"L x 9-1/8"W x 2"H


Rockford Fosgate

Authorized dealer

Prime Certified Power

Looking for a monoblock with reliable power ratings and efficiency without having to spend a fortune? Sonic Electronix is excited to introduce Rockford Fosgate's R750-1D. With a rating of 250 watts x 1 channel @ 4 ohms, 500 watts x 1 channel @ 2 ohms, and 750 watts x 1 channel at 1 ohm, this amplifier is perfect for those looking to amplify anything from entry level to some more serious power at the 1 ohm rating. Fine tuning your amplifier will be a cinch with the use of the variable high-pass, infrasonic, and variable bass boost crossovers. The use of a cast aluminum heat sink will control heat dissipation to keep your amplifier running cool and efficient no matter how long or short your listening sessions turn out to be. So if you are looking for a Class D high efficient monoblock amplifier that will never let you down, then look no further than Rockford Fosgate's R750-1D.

General Features:

  • Rockford Fosgate Prime Series R750-1D (Ships as R2-750x1)
  • Class-D Full Range 1-Ohm Stable Monoblock Amplifier
  • RMS Power Rating:
    • 4 ohms: 250 watts x 1 chan.
    • 2 ohms: 500 watts x 1 chan.
    • 1 ohm: 750 watts x 1 chan.
  • CEA-2006 Compliant Amplifier
  • Pulse Width Modulated MOSFET power supply
  • Wired remote bass level control included
  • LED power (green) and protect (red) indicators
  • Soft start turn-on
  • Nickel-plated RCA level inputs
  • Nickel-plated screw terminals
  • Preamp RCA outputs to daisy chain multiple amps
  • 3-way protection circuitry (thermal, overload, and speaker short protection)
  • Heavy duty aluminum alloy heat-sink for extreme heat dissipation
  • Input sensitivity: 150mV - 4V
  • Frequency Response: 20 - 250Hz
  • Total Harmonic Distortion (THD): <1.0%
  • Signal to Noise Ration: 100dB
  • Variable low-pass filter: 50 - 250 Hz, 12 dB/octave
  • Subsonic (infrasonic) filter: 15 - 40 Hz , 12 dB/octave
  • Variable Bass Boost: 0 to +18 dB bass boost at 45 Hz
  • Fuse Rating: 100A x 1 (recommended, not included)
  • 12 AWG speaker wire gauge outputs
  • 4 gauge power and ground wiring is recommended for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. Click Here for our contact information.
  • Weight: 7.825 lbs
  • Dimensions: 9.10"W x 6.77"L x 1.97"H
  • Also Found As: Prime 750 Watt, R7501D, R750, R7501
  • Authorized Internet Dealer
  • 1-year Manufacturer's Warranty

Specifications & Details

Power Specifications - Subwoofer Channel
RMS Power @ 4 ohms
250 watts x 1 channel
RMS Power @ 2 ohms
500 watts x 1 channel
RMS Power @ 1 ohm
750 watts x 1 channel
RMS Power @ .5 ohm
Power Specifications - Subwoofer Channel
Peak Power @ .5 ohm
Amplifier Specifications
Prime Series
Marine Certified
Amplifier Class
Number of Channels
1 - Mono
Total Peak Power Output
1500 watts
Total RMS Power Output
750 watts
Maximum Input Gauge Size
Minimum Impedance Unbridged
1 ohms
Minimum Impedance Bridged
Not Bridgeable
Frequency Response
THD at Rated RMS Power
Speaker Level Inputs
Preamp Outputs
1 pair
Built-in Crossover
Low-Pass (LP)
Low-Pass Crossover Frequency
50 - 250 Hz
Subsonic Filter
15 - 40 Hz
Signal-to-Noise Ratio
100 dB
Bass Boost
0 - 18 dB
Remote bass/level controller
Fan Cooled
Fuse Rating
100A X 1 In-Line Fuse Recommended
Total Fuse Rating
CEA-2031 Compliant
Sonic Certified Amplifier
Not Tested
Amp Bluetooth Connectivity
Hi-Res Certified
Low-Level Input Sensitivity
High-Level Input Sensitivity
What is in the box?
User manual
WITB: Amplifiers
Wired gain knob (wire attached)
Mounting screws (4)
Allen wrench
Other Accessory #6
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider

Item Details


Model Number:




Internal SKU:


Internal Product ID:


Product and How-to Videos

  • 3Sixty3 Aftermarket Setup Wizard Tutorial
  • Rockford Fosgate Prime Series Amplifiers
  • How To Install an Amplifier: Car Amplifier Basics Part 2

Customer Ratings & Reviews

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Amazing Amp!

I purchased this amp and I love what it can do! As most have previously stated, the amp pushes more than the 750w @ 1ohm as stated. The birth certificate with mine rated is at 880 watts. I am a HUGELY loyal RF amp and sub person but have always been leary of buying their PRIME line of products because they aren't "supposed" to be Fosgate's best line. This has changed my mind on the PRIME line. This hits just as hard as some of my older previous PUNCH and POWER amps!
I have it powering 2 RF P2's @ 1ohm in a ported box that I got here at Sonic Elextronix (P2-2X12) and it has almost rattled off the rear view mirror on the windshield!

By Corey on March 5, 2014


found this helpful.

Love this amp!

This amp is awesome! Love everything about it! Rated for 750 rms but most of them are over 900 rms @ 1 ohms (that will vary per amp of course) gotta love rockford for throwing in birth cirtificates and extra powa!

By Adam on November 9, 2012


found this helpful.

Rockford Fosgate R750-1D

When I first received it I realized that it was smaller than a previous Rockford Fosgate amp I purchased so I was worried it wouldn't push the full power it says it can output. The birth sheet that came with it says a total of 916 watts RMS @ 1 ohm sitting at 14.4v of course. This amp has some serious power for being so tiny! It outputs clean strong power that doesn't lack even on a hot summer day here in California. As the matter of fact I was able to drive from Fresno, CA to Pismo Beach, CA which is a 3 hour long drive and it never shut off on me.
I would recommend doing the 'Big 3 Upgrade' on your electrical system so you don't put so much stress on your battery and alternator. I recommend you buy this amp especially since it offers almost 1,000 of true power without leaving the wallet empty.

By Alex on August 22, 2012


found this helpful.

Great Value

Great product for great price. Easy to adjust equalizer and comes with volume knob

By Charlie on September 17, 2013


found this helpful.

Right choice

I thought this amp would not be able to drive my p3-12 Rock ford Fosgate sub but it gave me a big surprise, i bought this amp to add a little base to my factory stereo and i have no regrets if you are looking for a nice upgrate for your factor stereo well this is one of the best amp on the market thanks to sonic.

By Patrick on April 27, 2012


found this helpful.

Very good value

It was a really good amp for the value. I had it hooked up to a rockford t1 2 ohm 12" and it sounded really good.

By Andrew on October 28, 2013


found this helpful.

the little amp that could

this is a GREAT amp it pushes what it says and over and I know for a fact that it's .5ohm stable or can push it

this amp is probably the best ive had in a long time... it preforms about like a punch 600.1 I would even say thats it's closest retaliative.

By Adam on June 14, 2014


found this helpful.


I have this product hooked up to an 10" atomic subwoofer and my head unit is a double din pioneer. It is rated for 400 watts at 4 ohms and this amplifier matches it perfectly, although on the box it did not say it was rated for 400 watts at 4 ohms like it does on the website. The remote bass accessory that comes with this is a must! It is so easy to adjust the bass on the go and I use it all the time, and although there is a light on it that is quite bright, it turns on with the amp so you always know when it is on, which is nice. I will buy another Rockford Fosgate Product.

By ananymous on April 14, 2012


found this helpful.

Tiny amp with alot of heart!!!!!!!!!

I recommend this amp for a two sub combination, my amp birthsheet was 918 and i have 2 re audio srx 12s in a slot ported box and this amp pushes those 12s with ease. A must buy, don't let size fool you. Durability is Rockford Fosgate.

By cory on March 10, 2012


found this helpful.

really good amp!

i bought this amp b/c of brand & reputation of Rockford Fosgate. i have this amp for my JL Audio w6 10" sub & thus amp preforms very well doesnt get hot at all & is very reliable. i highly reccommend this amp.

By Marx on August 16, 2012


found this helpful.


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